Sulfonated poly(phenylene sulfide) films as polyelectrolyte...

Details Sulfonated poly(phenylene sulfide) films as polyelectrolyte... Sulfonated poly(phenylene sulfide) films as polyelectrolyte...

2009-05-18

2010-02-09

Lipman, Bernard (Department: 1796)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Ion-exchange polymer or process of preparing

C521S030000, C521S033000

Reexamination Certificate

active

07659319

ABSTRACT:
Proton conducting membranes are made of sulfonated films comprising poly(arylene sulfide), an olefinic polymer, and an elastomer. They are used in PEM fuel cells operating at temperatures above 95° C., or at low relative humidity. According to methods of the invention, sulfonated poly(phenylene sulfide) (SPPS) films are provided with a wide range of physical properties, which depend in part on the ion exchange capacity of the films. In particular, the degree or level of sulfonation can be tailored by adjusting reaction conditions such as temperature and time.

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patent: 2002/0045085 (2002-04-01), Formato et al.
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patent: 2004/0236038 (2004-11-01), Lee et al.

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